drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Mehrere Probleme in Linux
Name: |
Mehrere Probleme in Linux |
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ID: |
USN-3523-1 |
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Distribution: |
Ubuntu |
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Plattformen: |
Ubuntu 17.10 |
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Datum: |
Mi, 10. Januar 2018, 06:26 |
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Referenzen: |
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-17862
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-17864
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5754
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-16995
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-17863 |
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Applikationen: |
Linux |
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Originalnachricht |
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========================================================================== Ubuntu Security Notice USN-3523-1 January 09, 2018
linux vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 17.10
Summary:
Several security issues were fixed in the Linux kernel.
Software Description: - linux: Linux kernel
Details:
Jann Horn discovered that microprocessors utilizing speculative execution and indirect branch prediction may allow unauthorized memory reads via sidechannel attacks. This flaw is known as Meltdown. A local attacker could use this to expose sensitive information, including kernel memory. (CVE-2017-5754)
Jann Horn discovered that the Berkeley Packet Filter (BPF) implementation in the Linux kernel did not properly check the relationship between pointer values and the BPF stack. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-17863)
Jann Horn discovered that the Berkeley Packet Filter (BPF) implementation in the Linux kernel improperly performed sign extension in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-16995)
Alexei Starovoitov discovered that the Berkeley Packet Filter (BPF) implementation in the Linux kernel contained a branch-pruning logic issue around unreachable code. A local attacker could use this to cause a denial of service. (CVE-2017-17862)
Jann Horn discovered that the Berkeley Packet Filter (BPF) implementation in the Linux kernel mishandled pointer data values in some situations. A local attacker could use this to to expose sensitive information (kernel memory). (CVE-2017-17864)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 17.10: linux-image-4.13.0-25-generic 4.13.0-25.29 linux-image-4.13.0-25-lowlatency 4.13.0-25.29 linux-image-generic 4.13.0.25.26 linux-image-lowlatency 4.13.0.25.26
After a standard system update you need to reboot your computer to make all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well.
References: https://www.ubuntu.com/usn/usn-3523-1 CVE-2017-16995, CVE-2017-17862, CVE-2017-17863, CVE-2017-17864, CVE-2017-5754
Package Information: https://launchpad.net/ubuntu/+source/linux/4.13.0-25.29
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